Foreign tax paid - how to ensure everything is well entered to get the credits/deductions?

Hi.

I received a NR4 from Canada, code 09 (dividends) where the amount of DIV ($1700 USD after FX) received is identified. This DIV amount is entered as is on Box 1a (and Box 1b) . The NR4 form also indicates 185$ USD (after Fx) as "non-resident tax withheld" ... this amount is entered on Box 7 (Foreign tax paid) ... When entering the foreign taxes paid, there is no impact on the overall calculus of taxes. It refers to a potential credit or deductions for foreign taxes. How can I enter all that information to ensure that such credit or deductions is/are recorded? Am i missing something?